Rock drill



- 1 1751s. Feb. 15,1927. I QQHANSEN .6

ROCK DRILL Filed April 22,1926

CTIARLES C. HANSEN", OF EA STCtN, PENNSYLVANIA, ASSTGNOR 'lO INGERSOLD-RAND COMPANY, OF JERSEY CITY, NEW'JERSEY, A COB/PORATIOH'OF NEW JERSEY.

nook DRILL. I

Application filed April 22, me; are; No. 162,904 :7 I

This invention relates to rock drills, but

- more particularly to a valve bushing for the distril niting' valve of fluid actuated rock drills. I p I f The objects of the invention are toenable an oscillatory distributing valve of the plate type to be suitably mounted in a cylindrical valve chamber, to protect the valve chest against wear, to reduce the number of parts of the rock drill, and to hold the valve bushing and valve seat in the valve chamber in an improved and simplified manner.

' Other objects will be in part obvious and in part pointed out hereinafter.

The invention Consists of the combination of elements andarrangement of parts substantially as hereinafter described and more particularly pointed out in the appended claims and illustrated in the" accompanying drawings, in which Figure 1 is an elevation, in section,

. much of a rock drill as will serve to illuse trate the invention and showing the valve and the piston in one position,

Figure 2 is a view similar. to Figure 1 showing the valve and the piston "in another position,

Figure 3 is a transverse view taken through Figure 1 on the line 3-3 looking in the direction of the arrows, and

Figure 4 is a transverse View through Figure 1 on the line 4:-t looking in the direction of the arrows.

Referring to the drawings, the invention is shown embodied in a rock drill having a cylinder A provided with a free exhaust port B. Within the cylinder is a reciprocatory hammer piston-C having a forward extension or nose D. In this instance the cylinder A is sealed at its front end by a front cylinder washer E which receives slidably the nose I) of the piston C and the rearward end of the cylinder is provided with a closure in the form of a back cylinder washer F.

The parts comprising the casing of the rock drill, namely, the cylinder A, the front cylinder washer E and the back cylinder washer F are held together by'the usual side bolts F. The parts "so far described are shown merely for illustrative purposes, and the backcylinder washer F is shown solid for the sake of simplicity of illustration. It is to be understood, however, that the usual rotation mechanism may be provided to extend through the back cylinder washer of so F to cooperate with the piston C andthe usual chuck parts-(not shown) for imparting rotative movement to a drillstcel (not shown) against which the hammer piston C is adapted to strike. '1'

In accordance with the present invention, a. valve chest G preferably formed integrallY with the cylinder A, and longitudinally thereoL-is provided with a cylindricalvalve chamber H closed at one ,endby aWall .l

forming an integral part 1 with the valve chest G. i Pressure fluid for operating the percussive element of the drill may be conveyed from a suitable source of supply toa connection K in the valve chest G from whence it may pass through passages L and Ofbranching from the connection K andinclihed towards the rearward and forward endsrespectively of the chamber H. Passages P and Q lead from the valve chamber H to the rearward and front'ends respectively ,of theg'cylin-r derA. I i p 7 Within the chamber '11, inthis instance, is arrangedv abu'shing R recessed intermediate its ends as at Stoform afiat, seating surface Twhich plate valve U. The plate valve U sub-v stantiallylike 'the valve described in my copending United States application, Serial No. 69,954 entitled Rock drill, and a detailed description of the valve will therefore be omitted in the present application. The bushing R is preferably of generally cylindrical formation and. is provided at its inner end with a cylindrical portion V which cooperates slidably with the wall serves as a seat for a flat forming the chamber Hi A somewhat similar cylindrical portion W forms a seal near the outer end of the bushing and aflange X on the portion'W is seated in recess Y in the outer end of the chamber H and is of such length that it projects a slight distance The pin d is preferably of a length'corre- 1 sponding to the diameter of the chamber It so that the said pin will be held against endwise movement by the walls of the chamber.

Passages land fforiiied in'thereanyard and :front ends of the portion Z register With the passages P and Q and are controlled by the 'valveIl-M o Suitablemeansare provided for. holding the bushing R securely against endwise movement and also against rotation Within the chamber H. To this end a notchg is formed in the flanger X 'to cooperate with he fmn ylinde Wa her. E where y: the f hii eigslf 50,13 held hi t e am e, bnng the device, the pin 1 d may. iee itd. .iii't e tl lb end h "va v m y thenbe seated on the pin' d YVith th'e'parts' in ;th i so pogitio n, the bushing B may be iries flsi'fintgth ch mbe a he fro lgjwas r E may thenl be placed in t ear against thefendjfof the biish ged gnii si il ai mete bnip i ig the'c'asing ofthe drill may be drawn 'fir mly getherhfihus lding th bus g R 1* c irely within tlie clia'niber' H. p

' a niidfactna tedrock drill, the comofja cylinderQa alve chest on the 5 7 "gava f e aifib Me h n l dQPreie n fir nfend eyl derwa h r f t e c .e egi e he lbeshm he d s i J ng gaga ms t rota tiyei an U longitud nal nioveinentin' the chamber; Y v

,1 .2.-.;I,n,'a flui a uated e k ri the 1 j ...3* t,.2 New? h ethe 'cylin e Wi .ael e h ih a b i i ll h 'e he ipmi fqt ngi t 9 6 end theirqfili b l gl g ari s f l l atoi 'le L and a front cylinder Washer .at the end of the cylinder engaging; the notch for prevent- 111 rotative and longitudinal movement of the bushmg in the chamber.

7 Ina fluidactnated rock drill, thecoinbination ofa cylindeig arvalv 1 651 119,

in the chamber.

a gaint rot'atiye and longit iidinal movement 4. fluid actnated' rockdrill, the com:-

bi n ation o'f a' '1meer',"axe1y ,che'et 'on the cylinder having cylindrical Chaihb'eropen' only' at its forward end, a insertable throngh the front end "of p the; chamber. and extending throughout the length of i the chamber, cylindrical; end portions" ,onhthe sa d bushlnghav ng anm'termediate semithe notch for. holding "the'bushing bushing; cooperating -vvalli of the 1 n mb r ,o e of, sa d -i d, P r on je r in from the; chamber and"ha vii 1 g" a" notch;

cylindrical portion with a fifat nfiaeeffbrm; V 1 mg, a valve seat, and a front"cylinder ali fl t fie e di' ifl fi y'li'e 'i e e i th e teh i avthe Wel ing ferlho d l f aid. bushing ag'alnst' rotative, and longitndijnal movement in the'chaliibei'.

I specification? CHARLE HANSEN.

lnt'estimonywhereof I this i 

